Smart is NEVER going to be a great shooter. Never. But so what bc the kid gets to the rim and if he can do that then he will be ok. Westbrook rose and even wall to an extent are all still more then capable scorers bc they attack. They get to the bucket and get to the line. That is how smart will be an effective scorer.
You really can't reteach mechanics at this point. So don't expect him to be ray.
But smart gets to the bucket. He's also a complimentary player. He's not designed to be a number one go to scorer so get that idea out of our heads.